Oh yeh,
good little project for you . And yes, it will take all Summer
Black would be awsome cool looking, would match the motor if you get the new one .
I would go with a big fat pipe for the 125cc pit-bikes though . Loud Pipes save lives, yours
To heck with your neighbors, they won't be the ones running you over on the street when they can't here that quiet engine . Although it looks like your stock exhaust is in good shape as it is with a little ( Allot ) of pollishing . Take out the baffle and save your hind end . That bike is mighty small , and cars will eat you alive if they don't hear or see you .
Looks like fun though, enjoy it .
Cheers, Kelly